*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970109270147
19700370010
1971203005
1972011002
1973023005
1974043007
1975005005
1976011002
1977005005
1978033006
197902130015
19801450010
1981213006
1982111003
1983026008
1984023005
19852770117
198657160129
1987111150128
1988612160236
19892013431178
199035448200161
1991225012700199
1992905811100259
19937812821200418
19944812413800310
19954213817300353
19965213617201361
1997279812501251
199850618100192
19998476400119
2000621360063
20011030450388
2002827500186
200397180135
20041917220058
20051022230055
200659120026
200752150022
200816230030
200948140026
2010514140033
201128180028
201206260032
201346250035
2014434500097
2015316320051
20161110400061
2017412590075
2018310600073
20191111600082
2020124007
202114200016
2022010001
Total690121021171144032